Improvement



CHRISTIAN LESEBERG.

lmprov-e rhent in Machines for BendingWood.

N0. 124,753, Patented March19, 1872.

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CHRISTIAN LESEBERG, OF CINCINNATI, OHIO.

IMPROVEMENT IN MACHINES FOR BENDING WOOD. I

Specification forming part of Letters Patent No. 124,753, dated March19, 1872.

Specification describing certain Improve ments in Wood-BendingAppliances, invented by CHRISTIAN LESEBERG, of Cincinnati, in the countyof Hamilton and State of Ohio.

One part of my invention embraces the combination of a wood-bendingform, constructed in such a manner as to be adjustable for shapingdifferent sizes of the articles to bebent, as is required in bendingwagon and carriage bows with a wood-bending machine that effects thebending from the middle toward the ends of the wood, constructed andoperated in the manner as hereinafter described.

- of the screw and platen when in use.

Figure l is a side elevation of the main part of a wood-bending machine,with the form after the operation of bending has been completed and theproduct secured in its new shape. Fig. 2 is a plan of the form removedfrom the machine. Fig. 3 is a section of the empty form. Fig. 4represents two views of the mandrel. Fig. 5 represents theupsettingclamp.

l A is a frame or table, with timbers separated to receive two levers,which are pivoted asunder to suit any adjusted size of the form and beflush with the top of the table. Two uprights, erected at the center ofthe length of the table, take a pin-or stud, which holds the form inposition while the straight wood is being bent to the shape of the form.One of the uprights is hingedto better permit of placing and removingthe form. A setscrew works from beneath the table to force the woodagainst the form. B is a woodbendin g form, constructed of severaladjustable parts, but mainly of a mandrel, a, two sheaths, b and b; boththe mandrel and the sheaths are pierced for adj usting-pins, which areemployed to fix the length of the form to suit the varied requiredsizes. The form is provided with two shackle-clamps and two or morepairs of clamp lugs, c, c, 0, and c. E' is the upsetting-clamp,with theseparable base moved.

The operation is as follows: The levers being level, the bending-band isplaced on the lovers with the bars of the shackleclamps, and theupsettingclamps beneath the band,

and the wood to be bent upon the band. The

form is placed in contact and upon the wood, and fixed in position bythe stud or pin passing through the uprights and mandrel the twoupsetting-clamps are applied, one on each side away from the form, so asto embrace the bending band and the wood firmly enough to produce theupsetting of the inner curve in producing it. The set-screw beneath thetable is turned and the shackle-clamps adjusted to bring the wood incloser contact with the form before beginning to bend. The outer ends ofthe lovers are then brought up together by manual or other power,usually by means of cords and drum, to effect the bending to the extentdesired, when the bent articles are caught and held by the catch-bar,the levers allowed to go back, and the form, having the wood in the newshape additionally secured to it by inserting pins in the clamplugs anddriving wedges, is then removed to give place for another form.

If required, the same form may be stripped for immediate use again; butseveral forms should always be used with one machine,in order that thecooling and setting of the steamed h and bent wood in the new shape bemore thorough. I do not claim the mechanism whereby the bending iseffected nor the loop or catch-bar but I claim as my invention- 1. Awood-bending form, composed of the mandrel a, sheaths I) and b,shackle-clamps with levers moving about fulcrums outside of pin, allconstructed and operated substantialthe form, all constructed andoperated sub- 1y as hereinbefore described and shown. stantially ashereinbefore described and shown.

2. The combination of the upsetting-clamp, the bending band or strap,the form, when Witnesses: adjustable for size on a central mandrel, andsupported by a hinged upright and central CHRISTIAN LESEBERG.

JOHN C. MORRIS, EZRA COPE.

